Control switch



Jam. 4,1927.

J. R. KELLEY CONTROL SWITCH Original Filed June 2, 1921 '2 Sheets-Sheet l JoHN RoERT KELLz-IY 1,613,517" Janf4: 1927' J. R. KELLEY CONTROL SWITCH Orizinal Filed Jlfw 1921 2 sheets-sheet 2 JOHN RoafRr HELLsx @Harmful Patented Jan. 4, 1927.

PATENT OFFICE.

JOHN ROBERT KELLEY, OF COVINGTON, KENTUCKY.

CONTROL SWITCH.

Original application led June 2, 1921, Serial No. 474,464. Divided and this application filed January This is a divisional application of my application Serial No. 474,464, filed June 2, 1921.

An object ot my invention is to provide a control switch which may be shunted across the power lilies and which will preclude initial overloading of a motor.

Another object is to provide a switch ot this type that may he used to automatically lock a circuit closing mechanism against closing unless the n'lechanisms are in theirA proper relation before starting the motor.

.Another object is to provide a device tor the purposes stated that is simple in operation and construction.

'lhese and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which:

Fig. 1 is a fraginental side elevation ol' a trame having mounted upon it a control switch and cooperating mechanism of my inventiol'i.

Fig. 2 is an enlarged sectional View taken on line 2--2 of Fig. 1.

l? ig. 3 is a diagrammatical view ot' the wiring ot a control switch and an operating switch and motor showing a modilied form ot the control switch oi my invention.

My invention comprises a control switch comprising a housing 5 mounted upon a l'ramc 6 and containing a` sleeve 7 of some non-magnetic material, such as brass, about which extends an electricwinding coil 8 which is adapted with the magnetic core 9 disposed within the sleeve 7 to form an electromagnet. The core 9 has a central bore 10 therein through which extends a reciprocating rod 11 having mounted upon it an armature 12 adapted to be attracted by the core 9 when the electromagnet is energized. AA non-magnetic collar 13 is mounted upon the rod 11 adjacent one end thereof, which end extends through the trame 6 and has mounted upon it a suitable handle or knob 14, whereby the rod 11 may be longitudinally reciprocated in the sleeve. A key 15 may be employed to preclude rotatory motion of the rod 11. A block 16 upon which the housing is mounted, spaces the forward end of the housing from the rear ot the frame 6. A metallic ring 160 of magnetically responsive material spaces the rear end ot the sleeve from the. rear end of the housing. The block 17 mounted on the housing and Serial No. 688,371.

through which the rod 11 extends, has mounted upon it a metallic band 18 having a conical face. The metallic band is elec` trically connected with an operating switch 19 (see Fig. l) ot the type `disclosed in my cti-pending application, Serial Number 474,464. T he rear end ot the rod 11, or in other words the end spaced 'from the knob 14, has mounted upon it a block 2() of insulating material upon which is mounted spring contact arms 21 adapted to make an electrical connection with the conical tace of the metallic band 18 and when the arms are moved into contact with said band, they are tensioned so that when the force that holds the arms in contact with the ring is withdrawn, the tendency ot' the spring arms is to assume their normally mistrained positions and causes the rod 11 to he moved longitudinally in such direction ythat the arms 21 are disengaged trom the band 1S. The spring contact arms are electrically connected by means ot a liexible conductor 23 with a conductor post 22 mounted upon the block 16 adjacent Ithe housing 5. The core 9 and the armature 12 hear such relation that when the electromagnet is energized when the handle 14 is shifted, at which time the. contact arms 21 will move into engage mont with the metallic band 1S and the armature 12 will assume a position in immediate proximity to the core and will be retained in such position by the magnetic attraction ot the core against the yielding resistance of the spring arms 21. The winding 8 of the electromagnet is electrically connected with the band 18 and the return wire 241 of the line circuit.

A source ot electrical supply 26a repre sented in this case as a battery, has one oi its poles connected with the said line wire and its other pole connected to the return line wire The line wire .is electrically connected with the conductor post 22. The current passing through the line wire 25 and through the control switch passes to an operating switch 19 (see Fig. 1) by way ot' the wire 27. A locking arm 28 is mounted intermediate its ends upon a pivot 29 on theI iframe 6. One end of the arm 2S is adapted to engage a collar 30 which is pivotally mounted on a shaft 31 which terms a part otI the operating switch 19. The other end is adapted to be moved intermediate the coller 13 mounted ou rod 11 :ino the 'triuuc (3 :uid to therebiv preclude lon'fitudinul inoxeinent ol"` the rod 11 towurdtlie triune (i wherefore it is iiupoeible when locking` nrin 2S is in such interinediute position to nuilie elcctric'iil contiict between the sprng contuct :irins 21 und the metallic band 1S, fr Spring' 32 nornuilly retains the locking erin 2S in engagement with-the coller 3l). lie coller il() hns i 'tace il?) torined thereon dispoocdin Such position that when the conductor burn 3-1 of the operating switch 19 engage-contucts 35, the trice '33 on the coller 33t! will be exposed to und contacted bj: the rod rlie control switch :if-1 described adapted to control iin electricul connection betr-veen thewires Q1 und or is in other worden one pole ewitch. Vln Fin.: 2% is'. shown zrdoubie pole control switch nich u iuoditicution of the control switch shown in Fig'. 2. lntliis construction the metallic bin-1d is formed in two piecee 236 e nd 3T which ureinsuluted troni o` e another und euch otwhich isn'dupted to innlie an electrical connection with one ol" the spring urine 21./.otl which one is connected to the said wiring` und the other is connected to the-return wire i111 this.construction-the ltey precludes relatirel rotutory inotiono'tthe rod 11 und the metallic bund sections 'Bti und Si, wherefore he direction ot the tlow of current will not be inoditicd by 'the control switch. lt is also necesszirv in this-fortuito provide two conductor roos und two flexible nietellic conductors` 23. A-fsuiteble line Switch ifi is interposed between the Source ot electricul supply QG und the control switch. The operation ot the device is Vas follows.

Assuming' that the rparte are in the rele.- tion ue shown in'Fig'. 1, the spring Contact urine 21 nre in the poeition shown in Fi v"he'handle 1l is then pulled uw troni the traine 6 ton position-Shown in dotted lines in Fig' 2, therefore causing' the Spring Contact zirn'lsvl to engage the rneczilA lic band 18 und energizingtheelectromagnet contained within the housing 5,wheretore the miniature-12 will be retained in such posit-ion by the Inngnctizcd core t), thiitjthe Spring` iii-nis will remain in contact with the metallic bund. rl'he operating switch 1Q is then actuated no't'hut current is directed through wires 4() and t1 continuing resistnnccs l-Q :iud through the rczietuuccs to thc motor.

After the motor :armature luis begun to revolve, the operator releuees the handle ot the switch. 1Q, whereupon the contact urine Si are caused to engage contacts 35, 11twhich time the motor received n tull loud current.

Assuming new that the line Switcli Ble opened. wheretore the elect-roningnet .in the control VSwitch de-enencizt, und the :ic-

ticn ot the Spring' urine 2l causes the rod 11 Q und 3.

to be inoved longitndinall'iv to Such an extent that the contact between the spring y:mns 21 und the metallic bond 18 is broken.l This lnoreiuent ot the rod 11 serves to more the collar i?liiwuy.trointhe trgnne G. whereupon the end ot the 11i-1n 28, which was being' held inengngenient with the coilur 13 by ineane Ot the Spring' 32, is Separated 'from the collar .13, wherefore.theSpring,112 niores ithe r:irni vQS about rte` pirotol inountinf l 25) und causes the urin 28 to engage upon the. tace 33 ot the collar 31. Vfhen the 11111128 is in this positionA` the end tlicreot adjacent the control ,switch assumes :i position intermediate the collar 12E und the trinne t5, where'tore it is iinposeililcrto more the rod 11 to Such .un extent ne to iiguin bringv the Spring ContactI ornrs 21 into cnfrugeinent with the metallic bend 18.

From the Vtorcgoing it willrbe readily y:ippaurenttlV :it theonljv wey in which it will Aloe possible to again energiide the inotor will be by re-Volublgv actuating the nieansiuponthe operating switch -19 :21o-that the collar 31 thereotl will ouusethe [erin 2S to move -roin the position it now assumes intermediate the collar 13.in;tlie trarne 6. llien-tlle/Joperuting switch 19 has been thusproperly :ictu- :ited tor the purposes stuted,t-hepzu'ts are again put in position :1S shown in Fig. 1 and in readiness toagainetnrt upon the motor by directing-the current Vfirsttln'ough the control switch und the wires 410 and L11 .:1nd resistance .12, until,thein'meture ot theiniotor has begun to revolve. ut which tinowtho operating switch 19 `may be actuated to throw the 'ull load current ont/othe motor.

lint I claim. is:

1. In` a. control switchthe combination ot a-housing, n sleeve within thevhousing, nu electrical winding; Vabout the eleewfewn corc within the sleeve adapt-edwiththe winding to Ytorni un .electrofnjiitgnet und haring a bore therethrough,y n rod mounted reciprocally; in the bore, n,handlemounted ,on one end of the rod, Spring' Contact arms mounted upon the other end otl the rod, a tapered metallic plnte electricelly connected with o ne .end ot the winding mounted about the Sleevefrdzqit ed to be enguged by lthe springcontnct arios` an armature mounted upon the rod ndnpted to Contact the electroonognet. :ind to heiretained in contact. `with the eleetroonugnet toithereby retain the spring contactnrius in engagement with the ynietzillic lonnihn ooilzuzniounted on the rojd, inidrnienns adapted to be coiulitionedto precludemovement ol the collar :ind to therebycontnol engagement ot the contacts sind; the metallic plete.

Q. ln u control Switch the `c nnbi1nition with 11 Alrfinie haring` :in nperturc theretlu'u. a .block mounted in spaced Irelation toitlu tronic :indharing un aperture registering with the aperture in thevlrfuue, n ihoueing Loo mounted on the block, a magnetic core having an axial bore mounted within the housing, a nonrnagnetic sleeve surrounding the core, an electric winding disposed about the sleeve within the housing, a rod extending reciprocally thru the registering perforations in the frame, the block and the axial bore in the core, a handle on one end of the rod iuljacent the frame, a nonmagnetic collar on the rod adapted to reciprocate thru the aperture in the block, an armature mounted on the rod for reciprocation within the sleeve, a metallic band mounted upon the housing and electrically insulated therefrom, an electrical connection between the band and one end of the electric winding', spring contact arms mounted on the end of the rod and adapted to be carried into contact with the metallic band and means associated with the .trame for limiting the recipro -ation of the rod whereby the Contact arms are precluded Yfrom contacting the metallic band.

In a control switch mechanism the combination with an electromagnet, a metallic band electrically connected with the electromagnet, an armature reciprocable through the electromagnet, insulated contacts carried by the armature, for engagement on the metallic band when the armature is moved toward the electromagnet for energizing the magnet whereby the contacts are retained in engagement with the metallic band and mechanical means to preclude movement of the armature toward the electromagnet.

In testimony whereof, I have hereunto subscribed by name this l/lth day of Jann ary, 1924.

JOHN ROBERT KELLEY. 

